Apparatus for making castings.



G. M. CLARK, ls.

APPARATUS FOR MAKING GASTINGS.

APPLICATION man FEB.28.1912.

Patented Nov. 16, 19 15.

3 .SHEETS SHEET 1.

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ZQJL'WSGGS; v v J U v Gegfijllzarkmfir G. M: CLARK, JR. APPARATUS FOR MAKlNG cAsnNGs.

APPLICATION FILED FEB. 28. I912.

Paternal Nov! 16-, 1915 3 SiiEETS-SHET 2,

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CLARK, 3B, CE AHAEI, EAQSSEGE'USETTS, ASSIGNOB, Ti) H. HOE AND 60.,

"' "RPORATIGN GF EEW YORK.

Application filed :23, 3312.

12 mm it may come?? xnewn that E, Gzmaee {Jase r., ii; the ceunty of Essex and State eleuse'bts have invented eeriein new i Emprevemeets Appazetus 1E0? estige f Whie'e'the feliewing is s u L aeiueetlen and e as may hereinafier appear v empmses the features em; as 0 parts herelnaier descr bed ireted e I1 emparetus 1:20; equaily es en;

ection mowing the meenanisz the pump-i0 cause a flew of 1. id or casting; hex:

line 3-3 01" FEg. 2 435% Len 05 certain C be hereinafter described.

has been selected for-fine 0 comprises :1 metal posl a szippiy of mdiiezz iype w. ump 2 which iscozmeeted by a v ith a misting box 01' moi a of the pump is suppmted by a embezpfi and contains a pis* an upwardly extending r06. 5

Speeifieatien at Leaers Eater-3.

- 502% the mew (1 U 1 that size-Wm in 5g. 1; e118. F222;

lerial 320. 65593296.

115 means such a lever to operate the t0 emsou zh the spent to the casting "001;. The sk il of the operatiwfe is I reiied upon iework the pump in such a men- .ne as is produce the best results. He endeavors to Qri'afie the pump with the S: :l et ea L Lion in (wider than: the L red to the casting hex unifi-rra e? He also endeavols to operate the p11: p same B ginning is end e 05 the stroke order the znemsntmn f e 1e metal delivered to the asking 1: f be sen; .nfz. The reason unifenn anii censtantm0- mentum that See force 0f the metei, as it is (jleii'v'ered the casting 003 is reliefi upon in press the Ineirix smeeih against she box. If the momentum of the meta varies there me" be places where the matrix Wiiz 213 11 1 away frem the 100;; thereby q a law spot in the steree zype glaze. memenium is desirable in order e needy perfect castings of ieh there may be :10 111215231X empi o sun Xi important that e metal shall be deiivereni in the same time at each eperfi't preximaiely 53'5 degrees, may be employed which wiil preduce a better plate than metal which is hotter. The metal haste be hot enough, however, *5 allow fur a drop n abem enou 11 v0 erodes s med reams when the i (J pump is named slowly. operative were able t0 actuate the pump so as tb de- Pg'belied New. 16, F915.

me pump. The reason for this; 15 that cemperamvely 10W heat metal, ep-' liver the metal. at a uniform speed it weuld" be possiiaie meffect a consizlez'eble saving in fuel fer heating the met al and in the meta itself which "gees to Waste quite rapidly under, a high temperature.

his an abject 0:" this invention to insure.

ake delivery of metal to theeasting box in I the manna? toward W 15011 the opera t ive xiirests his efi'oris. To fins ezui automatic mechanism is provided under the control of the operative to actuate the pump. The i11- ventor prefers to use fluid pressure as a source of power for the pump actuating motor, and as compressed air is usually installed in foundries, it is utilized to actuate the pump. 3 i y The pump actuating ,motor comprises a cylinder secured to the upper ends-of two j-guide rods 11, the lower ends of which are fixed in a plate 12 permanently secured .to the bridge member 6, extending across the metal pot 1, The cylinder has an upper head 13 and a. lower head 14 which is provided with a stufiing box 15 through which passes a rod 16 secured to a piston 17. The

lower end of the rod 16 is secured by a nut 18 to a cross head 19- which is adapted to slide upon the rods 11. The cross head isconnected by a yoke 20 with the pump rod 8 vpressure may be varied by adjusting the cock 23 to allow air to escape with greater or less rapidity.

A valve 24 is provided by which the operative may admit compressed air to the cylinder 10 to actuate the pump. The valve may be convenientlv mounted as shown in Figs. 1 and 2 on an arm 25 projecting from the plate 12. A cover 26 is bolted to the end of the arm and chambered to receive the valve slide 27. Air pressure from any convenient source of supply is admitted to the chamber through a" pipe 28. The slide 27 has a projecting stz-d 29 which .passs through a stufiing box 30 on the cover L and is connected by a block 31 with a rod 112. This rod is adapted to slide in lugs 33 proiectingfrom the cover 26. A handle 34 is secured to the rod 32 in position readily aecessible'to the operative. The valve 24 is similar to the slide valve of a locomotive. When the slide 27 is in the positionoshown in Fig. 2 the opening to the pipe 22 is covered by the slide but open to the atmosphere through an exhaust port 35. When the slide is moved to the left the'airpres'sure communicated to the chamber through the pipe 28 is admitted'to the pipe 22 and thence to the cylinder 10, the exhaust port 35 being closed. I

Mechanism is provided to automatically cut off the air supply to the cylinder as the pump completes its working stroke. Means is also provided for varying thetime at which this mechanism operates in order that the length of the working stroke of the pump may be adjusted to discharge the dethe cover 26 and connected with one end of.

the toggle joint 63' consisting of two links 36 and 37. The other end of the toggle is pivoted between ears 38 on the plate 12. The normal position of the toggle is shown inFig. 1 where the middle joint of thelinks is slightly elevated from the straight arm position. The handle 31 may then he pushed toadmi't air to the pipe 22 which will break the toggle still further. In order that the parts may-not he accidentally displaced .irom this position a spring pressed plunger 39 is constructed to engage a groove 40 in the rod 32. As the cross head 19 descends the toggle is straightened by an abutment carrlerl thereon which moves the rod 32 to the right and closes the valve 21. The ahutment is preferably in the form of a spring pressed plunger 11. The plunger is carried ina Sleeve 42 threaded into a project-ion 42 on the cross head. It is. apparent from 2 that the sleevemay be adjusted vertically in the cross head so as to permit greater or less travel before the plunger straightens the toggle and thereby cuts oil the air supply to the pipe 22 and opens the pipeto atmose pherlc pressure. By this construction the strokeof-the pm 3 may be adjusted to give a greater or less flow of metal tcthe casting After a casting has been made it is necessary to allow it to cool somewhat before it is removed from the casting box or mold. It sometimes happens that workmen in the foundry will attempt to pour asecond cast ing while the first is cooling. This is known as a spill and it is a source of danger tn the foundry men as well as causing the loss of a cas ing. v

- It is a further object of this invention to provide means for preventing a second dis-- charge of metal to the casting box before the box is prepared to receive another supply of 'metal. A In accordance with this object one feature of the invention contemplates the provision of a locking device whereby the metal supplying pump is rendered inoperative until after the casting box has been emptied and closed again to receive anew charge of'metal.

It is apparent from Fig. 2 that with the. toggle links 36 and 37 in a straightened po- 'sition, noforce applied to the rod 32 will break the toggle and allow the rod to slide thereby opening the valve 24 and actuating the pump. A stop screw -15 projecting through the arm 2?- supports a finger 16 below the center of thetoggle.

left in a straightened position against the finger 46 when the cross head rises under theimpulse of the springs 21. That is, a her a single stroke of the pump the valve is locked-to prevent a second operation. (onice The toggle is its mea re section is made with the casting box so that the toggle is slightly broken when the box is closed. connection isunade by ,a rock shaft 47 upon which the finger' lfi is mounted which is joined by" a flexible shaft l8 with the casting box l.

53 WhlOlRfOZ'IDS an .abuirneut for ills box by engagzn side gages which are em ployed to secure the matrix to the box l9. all

. of which parts are Well known to ilwse skilled in the art to which this invention relates. In the best to the investor, the pump is unlocked through the motion of amovable member of the castin box, in this instance, the movement of {he box 49 is employed break the toggle unlock the pump actuating valve. iv

plunger s5 passes through the bar 53 when the casting box is opened it pro jec'ts from the bar or) toward the box under the impu of a spring A block 5?" integral with the plunger carries a pirotally mounted lager 58 which is constructed 5o engag the end of a trip 59 which is'seeured to a stud 60 freely mounted in a bloclr. attached to the bar 53. The other end of the flexible shaft 48 is secured so this stud. Vibe; the box 49 is in its closed position and the pump is discharging metal to the casting box, the toggle which was broken when the operative pushed the handle' l, is about to be straightened by the plunger 4:1. The linger 58 is in the lull line position of Fig. l and the trip 59 may be in either the full or dotted line position. If the nip is in the full line position it will be turned to the other position by the straightening ofIt-he toggle to close the valve 2% which will depress the finger 46. After the pump has discharged :1 supply of metal to the casting box the valve 24 is locked by the toggle as hasbeen described. The box 49 is then opened to remove the casting. As the box moves away from the bar 53 the plunger 55 is projected therethrough by the s ing The spring is preferably mounteo upon a. stud 62, one end of which is enlarged and bears against the finger 58. This will allow the finger to turn if necessary to pass under the trip 59, the parts then assuming the dotted positions in Fig. 4. The pump is-still held inoperative but as soon as the box if) is again closed the finger 58, on its movement to the right, will turn the trip 59 which. through the flexible shaft 48 and rock shaft 47, will lift the finger 46. This will sli htly break thetoggle which will be held against straightening by a short spring 63 (Fig. 2) surrounding the rod 32.

form at present known 1 These parts are now in the position shown in Fig. 1 and the mold a may be operated to make another casting. v

The feature of this inven'lion which relates more part-it:ularly to increasing the speed of production of castings contemplates the vision ofan indicaior or alarm 'to indicate the expiration of the necessary inierim between the curing of the casting and its removal a. ter the metal has set. The duration of the cooling period is at determined by the judgment of the ve and. in order to insure agaipst a casiing 53 opening the casting unnecessarily prolonged.

\ 1n the present embodiment-oi the invention the indicator comprises a cylinder 66 attached to the cylinder-l0 and a pipe 67 leading from the bottom of the cylinder to the pipe This cylinder contains a. piston 68 having a piston rod 69 surrounded by a spring 76 compressed bet-Ween she piston and the cylinder head 71. The upper portion of the cylinder is vented at 72 so that air can escape when the piston is lifted by air pressure from the pipe 6?. Air is admitted from the pipe 6'? but restrained from zero the plate has set, this period is iril escape theretlirough by a ball valve '4' A ring 7 lis secured. to the piston rod 59 near its upper end so that as the piston descends the ring will cause a hammer 75 to strike a bell 76. The ring is engaged by a trip 77 pivoted on the hammer in order that the ring may pass on its upward motion. The air confined below the piston through a cock 78 which may be adjusted to allow il'ie air to escape with greater or less rapidity. Y

The piston 68 is lifted to the limit of its upward movement as soo'n as the. valve 24 is opened to actuate the pump. When the valve is closed the pipe 22 is vented to the atmosphere but the air in lhe cylinder 66 is confined by the ball valve 33 and can escape only through the cool-z 78 which is set so that the bell will b struck after a sufiicient time to allow the casting to set. i

In describing the operation of this invention it will be assumed that the parts are in the position shown in Fig. 1, the casting box 4 having been closed with the matrix secured therein. The operative will push the handle 34, which will admit air'through the valve 24 to the pipe 22 and break the toggles 63" as has been described. Air presescapes 4 metal through the spout 3 to the casting box. As soonas the valve Qlis opened, air pressure is communicatedto the cylinder 66 through the pipe 67 and the piston {BS/is lifted against the tension of the spring'70. As the piston 17 descends at a speed gave erned by"-the-'escape of air through lthe cock 23, the plunger 41 engages the middleof the toggle andvsti'aightens the links until fur-; ther movementisvarrested by the finger 46- and stop screw 45. "Any excess movement of-the vertically moving parts is taken up by the spring on the plunger 41. The straight eningof the toggle closes the valve 24;, as has been hereinbefore made plain, and opens the pipe to the atmosphere;

The parts are now in the position shown in Fig. 2. The;-piston 17 at once starts to rise under the impulse of the spring 21 and the piston 68 commences to descend under motion is transferred to the fingerAG to lift the center of the toggle slightly above a straight arm position wherelit is held by the spring 63, in a position to be furtherbroken by pressure upon the handle 36% to again open'the valve 24. v It is obvious that various features of this invention as defined in the claims may be used in making castings of other material than type mptal and in connection with other forms of molds than the casting box illustrated and'described. Therefore in the appended claims where the context so permits, the term casting box is to be understood as includingwithin its meaning any of the well known forms of molds, flasks, or analogous devices. It is evident that non-metallic matter may be substituted for type metal Without departing from the spirit of the invention. ,What'is claimed as new, is

- 1. Infan apparatus for making castings, the combination with a supply of molten metal, of a casting'boie'means for supplying metal to the box' under a constant momentum, and automatic means for stopping the movement of the metal supplying means ,ter.

' 2. In an apparatus for making castings,

the'combination with a supply of molten metal, of a casting box, fluid pressure means for supplying metal to the box undera -con-' stant momentum, and automatic qneans'for rendering the fluid. pressure means inoperay remove the casting. As the box is closed again the'trip 58 turns the finger 59, which aftera flpredetermined operation of the lat the combination with a supply of molten metal, ofa casting box, means for supplying metal to the box under a constant momentum, means for varying the momentum, and automatic means for repdering the metal supplyingimeansinoperative after a predetermined operation of the latter;

" 4. An apparatus for -making castings, having, in combination, a supply of molten material, a casting box, a pump for discharging the material .to the casting box,

a fluid pressure motor. for actuating the pump, a valve for admitting fluid pressure to the motor, and automatic means for I closing the valve after a predeterminedacf tuation of the pump. a

5. An apparatus for making castings, having, in combination, a metal pot, a castmg box, a pump to discharge the metal to the casting box, a fluid pressure motor to actuate. the pump, anda locking device to pre- 4 vent. a second operation of the motor before to receive the casting box has been prepared another casting. a

(i, In an apparatus for making castings, thd 'combination with a supplyof molten metal, of acasting box, fluid pressure means for supplying metal to the box under a constant momentum, means for varying the momentum, and automatic means for renderlng the fluid pressure means inoperative after a predetermined operation of the latter;

7. In an apparatus for making castings, the combination with a reservoir holding, a supply of molten metal, a casting box, a pump in the reservoir, fluid pressuremeans for causing the pump to deliver a supply of metal to the casting box. under a constant predetermined momentum, and means operated by the pump for cutting 05 the fluid pressure.

8. In an apparatus for making castings,

the combination with a reservoir holding a; supply of molten metal of a casting box, a

pump in the reservoir, fluid pressure means for causing the pump to deliver a supply of metal to the boxunder constant momentum, means for varying the momentum, and means operated by the pump for cutting oil the fluid pressure, I

9. An apparatus, for making castings, having, in combination, a metal pot, a casting box, a pump to deliver metal from the pot to the castingbox, and locking means for preventing a-s'troke of the pump after. a single 'operationthereof.

1Q. Anapparatus for making castings, having,1n combination, ametal pot, a casting box, a ppmp to deliver metal from the pot to; the c'astingbox, locking means for single operation thereof, an meansoper t P' "J 11.'An apparatus" a st n s "preventing a stroke of the un pafter a l I ated by the castingbox tor unlocking jthe having, in combination, a metal pot, a casting box, a pump to deliver metal to the casting box, a piston and cylinder connected with the pump. means for admittingfluid pressure to the cylinder on one side of the piston, and an adjustable vent on the other side '01 the piston for controlling the speed of the piston in the cylinder during its working stroke. 12. An apparatus for makmg castings,

having, in combination, a metal pot, a cast been closed to receive the metal.

13. An apparatus for making castings, having, in combination, a casting box, a pump to supply metal to the casting box, a fluid pressure motor to actuate the pump, a time indicator having connections with the motor by which itis thrown into operation, said indicator comprising a cylinder and spring actuated piston, and a vent to regula the escape of air confined in the cylinder.

1%. An apparatus for making castings, having, in combination, a metal pot, a casting box, a pump to deliver metal to the casting box, a fluid pressure motor to actuate the pump, a valve to control the supply of fluid pressure, a toggle connected with the valve, means to straighten the toggle after a delivery of metal by the pump, I

and means operated by the casting box for breaking the toggle when the box is in metal receiving condition. 15. An apparatus for makln ca tings, having, in combination, a casting box, a

pump to deliver metal to the casting box, a time indicator, a fluid pressure motor to ac tuate the pump, a valve to control the fluid pressure supplied to the motor, and connections between the fluid pressure and the indicator to throw the indicator-into operation to indicate a period of time after the valve is operated. I

16. An apparatus for making castings, having, in combination, a metal pot, a pump, a. motor to actuate the pump, means to control the power supplied to the motor, and a time indicator rendered operative by the means for controlling the power supplied to the motor.

17. In anapparatus for making castings, the combination with a supply of molten metal, of a casting box, a pump actuated by fluid pressure for supplying metal to the box under a constant momentum, a manually opened valve for supplying fluid under pressure, and connections from the pump wherebythe valve is automatically closed after a predetermined action of the pump.

18. In an apparatus for making castings,

the combination with a metal reservoir, of a casting box, a pump, apiston and cylin der actuated by fluid pressure devices for operating the pump, means for supplying fluid under pressure-to the cylinder, and means operated by the pump at the end of its working stroke for shutting off the supply of fluid under pressure.

19. In an apparatus for making castings,

a casting box, a pump, a piston fand cylinder actuatedby fluid pressure devices for operating the pump, a valve for admitting the combination with a metal reservoir, of

fluid under pressure to the cylinder, and

connections whereby the piston closes the valve and locks the same in closed position at the end of the working stroke of the piston.

In testimony whereof, I have aifixed my signature, in the presence of two witnesses. GEORGE M. CLARK, JR. Witnesses:

FRANKLIN F. CLARK, E. C. Menus. 

